Search for high-mass resonances decaying to dilepton final states in pp collisions at a center-of-mass energy of 7 TeV with the ATLAS detector

Abstract

The ATLAS detector at the Large Hadron Collider is used to search for high-mass resonances decaying to an electron-positron pair or a muon-antimuon pair. The search is sensitive to heavy neutral Z' gauge bosons, Randall-Sundrum gravitons, Z* bosons, techni-mesons, Kaluza-Klein Z/gamma bosons, and bosons predicted by Torsion models. Results are presented based on an analysis of pp collisions at a center-of-mass energy of 7 TeV corresponding to an integrated luminosity of 4.9/fb in the dielectron channel and 5.0/fb in the dimuon channel. A Z' boson with Standard Model-like couplings is excluded at 95 percent confidence level for masses below 2.22 TeV. A Randall-Sundrum graviton with coupling k/Mbar = 0.1 is excluded at 95 percent confidence level for masses below 2.16 TeV. Limits on the other models are also presented, including Technicolor and Minimal Z' Models.

31 pages plus author list (53 pages total), 10 figures, 16 tables, submitted to Journal of High Energy Physics Revision corresponds to published version

References in corpus (20)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Implications of CTEQ global analysis for collider observables
• Parton Distributions for LO Generators
• Theoretical status and prospects for top-quark pair production at hadron colliders
• Parton Distributions for LHC
• Minimal Walking Technicolor: Set Up for Collider Physics
• Precision electroweak calculation of the production of a high transverse-momentum lepton pair at hadron colliders
• Z' physics with early LHC data
• Precision electroweak calculation of the charged current Drell-Yan process
• Technicolor Walks at the LHC
• Low-Scale Technicolor at the Tevatron and LHC
• Search for narrow resonances in dilepton mass spectra in pp collisions at sqrt(s) = 7 TeV
• Search for a heavy neutral gauge boson in the dielectron channel with 5.4 fb-1 of ppbar collisions at sqrt(s) = 1.96 TeV
• Torsion Phenomenology at the LHC
• Proposal for chiral bosons search at LHC via their unique new signature
• New results for t bar t production at hadron colliders
• Indirect Searches for $Z^{\prime }$-like Resonances at the LHC
• A search for heavy Kaluza-Klein electroweak gauge bosons at the LHC
• Torsion Discovery Potential and Its Discrimination at CERN LHC

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